As more and more tree donation organizations pop up in the Mountain West, experts explain trees' abilities to cool the ...

One of the largest old elm trees in Toronto — possibly in all of southern Ontario — is on its last legs. But as the city finalizes plans to take down the Barton Avenue landmark next week, a University ...

ODNR said there are no reports of the elm zigzag sawfly causing the death of elm trees. The insects grow to one-half-inch long and look similar to caterpillars, and are light green in color.